PULSE 3300mAh 12S 44.4V 50C Stick Pack Version LiPo Battery For RC Helicopter

For 550-size to 600-size helicopter with 12S config, like Goblin 500, Goblin 570, T-Rex 600E DFC, Synergy E5. For the positive / negative (red & black) wires, these will solder to a standard connector of your choice, such as an EC5 connector.